function ZoomInitial(wsnav){
    this.id = "zoominitial";
    this.toggle = false;
    this.wsnav = wsnav;
    wsnav.tools[this.id] = this;
}
ZoomInitial.prototype.click=function(){
    if(!this.wsnav.isLoading){
        this.wsnav.loadingAction(true);
        this.wsnav.setInitialBounds();
        this.wsnav.refreshMap();
    }
}